Use protobufs for packed message data #282

Job	Run time
PhotonClient Build	50s
Gradle Build	5m 15s
Build Examples	3m 49s
Build Offline Docs	47s
Photonlib - Build Docker - Athena	5m 58s
Photonlib - Build Host - Win64	5m 16s
Photonlib - Build Docker - Raspbian	6m 15s
Photonlib - Build Host - macOS	8m 26s
Photonlib - Build Docker - Aarch64	6m 36s
Photonlib - Build Host - Linux	5m 51s
Build fat JAR - Win64	2m 31s
Build fat JAR - macOS	2m 55s
Build fat JAR - Linux	2m 30s
Build fat JAR - macOSArm	3m 17s
Build fat JAR - LinuxArm32	1m 42s
Build fat JAR - LinuxArm64	1m 57s
Build image - ${{ matrix.image_url }}	0s
release	0s
	1h 3m 55s

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